Spring-and summer-lfy semi-liane or scrambler up to 2-(4) m. long, with weak, openly branched, often interlacing stems. Branches up to 3 dm. long, internodes up to c. 8 cm. long; final branchlets subterete, c. 1 mm. diam., deeply striate, sparsely silky-hairy to glab. Lvs up to 25 × 8 mm., on ± silky petioles. Lflts 3-5, 4-5 × 3-4 mm., broadly obcordate, glab. or nearly so. Infl. a 2-6-fld open raceme, on slender ± silky peduncle; bracteoles ciliate; pedicels ± 2 mm. long. Fls 6-10 × 4-8 mm.; calyx c. 4 × 2 mm., campanulate; teeth narrow-triangular, acute, glab. without, ± villous within. Standard broad, 2-lobed, slightly > keel, white to cream, purple-veined and-blotched; keel ± 3 mm. broad, greenish white; wings 2-4 mm. long, whitish, faintly purple-veined; auricles pointed. Ovary glab. Pods 8-15 × 4-6 mm., turgid, ellipsoid; valves dark brown, replum thick; beak straight, stout, subulate, 4-5 mm. long. Seeds 2-4, ± 3 mm. diam.; white, sts tinged pale blue, ± heavily black-mottled.
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